DEVREL-1233 setup dependabot for lz-definitions

[nazreen]

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[github-actions]

🧪 E2E Test Status

E2E tests are non-blocking and validate real blockchain interactions. Failures may occur due to network issues, RPC rate limits, or external service downtime.

Test Runs (Newest First):

• ✅ Run #6627 - Passed - 2026-01-23 01:54 (UTC)
• ✅ Run #6623 - Passed - 2026-01-23 01:15 (UTC)
• ✅ Run #6622 - Passed - 2026-01-23 01:11 (UTC)

[cursor]

PR Summary

Adds automated dependency updates via Dependabot.

• Introduces .github/dependabot.yaml to enable daily npm checks across "/", "/packages/*", and "/examples/*"
• Restricts updates to @layerzerolabs/lz-definitions (direct dependency only)
• Limits to one open Dependabot PR at a time and groups updates under lz-definitions

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.